US2308656A - Fuel feeding means - Google Patents

Description

y Jan. 19, 1943. c. Hmm

FUEL FEEDING MEANS Filed Nov. 18, 1941 mdf/F5 mgfz Patented Jan. 19, 1943 UNITED STATES PATENT OFFICE FUEL FEEDING MEANS Charles Harth, Alva, Okla.

Application November 18, 1941, Serial No. 419,651

1 Claim. `(Cl. 10S-4) This invention relates generally to motor vehicles and pertains particularly to fuel feeding mechanism.

The primary object of the present invention is to provide a means in association with a fuel t pump such as is commonly used in connection with the operation of an internal combustion engine, by which the fuel may be caused to bypass the pump so that the operator of the engine can feed gasoline or fuel to the engine carbureter if the pump should go out of action or if it is desired to force more fuel to the carlouretei1 than the pump is supplying.

Another object of the invention is to provide in association with a motor vehicle fuel pump, a valved by-pass pipe line around the pump together with a hand pump connected with the by-pass line to facilitate drawing fuel into onev end of the by-pass line and forcing it therefrom out of the other end upon the side of the fuel pump nearest the carbureter so that the carbureter may be fed fuel manually as well as by the mechanically operated pump or in the event that the pump fails to function.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing, it being understood, however, that the invention is not to be considered as limited by the specific illustration or description but that such illustration and description constitute a preferred embodiment of the invention.

In the drawing- Fig, 1 is a view partly in elevation and partly in section of the device embodying the present invention the same being shown in association with a conventionally illustrated fuel pump.

Fig. 2 is a view upon an enlarged scale of portions of the device lying upon opposite sides of the fuel pump showing the control valves which form a part thereof.

Referring now more particularly to the drawing the numeral I generally designates a conventionally illustrated fuel pump such as is used in association with internal combustion engines, the numeral 2 designating the fuel supply line leading to the pump and numeral 3 designating' the fuel line leading from the pump to the carbureter, not shown.

In accordance with the present invention there y are provided the two three-way couplings 4 one of which is connected between the pump. I and the fuel supply line 2 while the other is connected between the pump and the supply line 3 which runs to the carbureter, as shown most l55 clearly in Fig. 2. Each of these three-way couplings has a laterally extending nipple 5 and this nipple of the coupling connected with the pipe 2 has connected therewith a lead-off check valve which is indicated generally by the numeral 6 and which comprises a tubular body 'I having threadably secured in the lower end thereof the removable centrally apertured ball seat 8 upon which is located a ball check 9. Spaced from the seat 3 in the central part of the tubular body 1 is a spider l0 between which and the ball 9 is located the expansion spring II which functions to maintain the ball on its seat. This ball check leads from or opens away from the pipe line 2 so that fuel can only flow out of the pipe line through the valve 6 but is prevented from returning by this way.

Upon the opposite side of the pump is located an inflow check valve indicated generally by the numeral Il and having one end threadably secured in the nipple 5 of the adjacent coupling 4. In this lower end of the tube I2 which forms a part of the valve structure II there is secured a spider I3 and in spaced relation with the spider Y there is formed across the tube the ball check seat I4 upon the underside of which is located a ball check I5. Between the ball I5 and the spider I3 is an expansion spring I6 which normally urges the ball upwardly onto its seat. This check valve, as will be readily apparent, functions to permit fuel to flow through into the pipe 3 but prevents the fuel from passing outwardly through the tube from'this pipe.

The upper end of each of the check valves 'I is suitably interiorly screw threaded to receive a sleeve nut I'l and the valves are coupled together by a by-pass conduit which is indicated generally by I 8. This by-pass conduit comprises a short tube I9, one end of which isr coupled by means of the sleeve nut I'I with the upper end of the check valve 6, an L-shaped tube 20 which has one end coupled by means of the sleeve nut I'I with the check valve II, and three-way coupling 2I, one arm of which is connected by the sleeve nut 22 with the tube I9 while a second arm is connected by a similar sleeve nut 23 with the other end of the tube 20. Thus these three units I9, 2U and 2| form a by-pass conduit around the pump I.

The third arm of the coupling 2| has connected therewith by means of the sleeve nut 24, an end of a pipe 25 and this pipe is run to a convenient location within the vehicle in which the device is installed and may pass through the dashboard 26 toward the instrument panel 21.

Supported upon the back of the instrument panel is a piston pump which is indicated generally by the numeral 28. This comprises a cylinder 2i) which at its forward end is provided with a suitable coupling 30 to facilitate connection of the pipe 25 therewith. At its forward end the cylinder is closed by a cap 3l which has an elongated tubular stem 32 which extends through a suitable aperture in the instrument panel and receives upon the two sides of the panel the lock nuts 33 which are employed to rmly secure the head of the piston pump to the panel.

Within the cylinder 23 is a piston 34 having a stem 35 which extends through the tubular stem 32 and carries a head or button 35 upon its forward end by which the reciprocation of the piston in the cylinder is effected.

From the foregoing it will be readily apparent that when the piston 29 of the pump 28 is pulled out or toward the panel 2'! a reduced pressure will he created in the pipes le, 2&3 and 25. The reduction in pressure will merely cause the ball of the valve il to seat more iirrnly but will permit the hall of the valve G to rise from its seat and thus draw fuel from the line 2 into the conduit IB. Then reversely shifting the piston 35 such fuel will be ejected through the pipe 2] then through the inlet check valve Il to the fuel pipe line 3 from which it will pass to the carbureter of the machine. Thus it will be seen that by this device the operator of the vehicle can force ad dtional fuel to the carbureter if the pump is not supplying a sumcient quantity or if the pump should fail entirely the carbureter may be'kept supplied manually so as to keep the machine running until it can be gotten to a place where necessary repairs may be made upon the pump.

What is claimed is:

The combination with a fuel pump having a fuel supply line leading into one side and a carbureter supply line leading from the other side, of a check valve connected With said fuel line outside and independently of the pump structure and opening away from the same, a second check valve connected with the carbureter line outside and independently of the pump structure and opening toward the same. said valves being out of the line of ow of fuel to and from the pump, a conduit leading from the rst check valve to the second check valve across the pump, a pipe having one end opening into said conduit between the check valves, and a hand pump comprising a cylinder having the other end of said last pipe connected therewith and a piston in the cylinder for eiTecting the drawing of fuel past the first valve into the conduit and the ejection of the fuel from the conduit past the second valve into the carburetor pipe line.

CHARLES HARTH.

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